2 files changed, 4 insertions(+), 1 deletions(-)

M port/cis.c
M port/unthwack.c

@@ 214,7 214,8 @@ nanoamps(Cisdat *cis)
 }
 
 /*
- *  only nominal voltage is important for config
+ * only nominal voltage (feature 1) is important for config,
+ * other features must read card to stay in sync.
  */
 static ulong
 power(Cisdat *cis)

@@ 168,6 168,8 @@ unthwack(Unthwack *ut, uchar *dst, int ndst, uchar *src, int nsrc, ulong seq)
 					lit = (lit - 64) & 0xff;
 				}
 			}
+			if(d >= dmax)
+				return -1;
 			*d++ = lit;
 			lithist = (lithist << 1) | (lit < 32) | (lit > 127);
 			blocks->maxoff++;